The new states $X(1910)$ and $X(2300)$ and higher light excited $J^{PC}=1^{+-}$ mesons

TL;DR

This paper investigates the properties of new light meson resonances $X(1910)$ and $X(2300)$, analyzing their potential quark structures and decay modes to identify their nature within the light hadron family.

Contribution

It provides a theoretical analysis of the mass spectra and decay behaviors of $X(1910)$ and $X(2300)$, proposing possible assignments as $h_1^\'(2^1P_1)$ states.

Findings

$X(1910)$ may be an $h_1^\'(2^1P_1)$ state with $sar{s}$ quark content

The structure of $X(2300)$ remains uncertain

The study uses the MGI and QPC models with fitted parameters

Abstract

The BESIII Collaboration recently reported the observation of two new resonances, $X(1910)$ and $X(2300)$, which have sparked our interest in studying the light hadron family with $J^{PC}=1^{+-}$ . In this work, we investigate the mass spectra and OZI-allowed two-body strong decays of $b_1$, $h_1$, and $h_1^\prime$ using the MGI model and QPC model with newly fitted parameters. We also explore the possibility of identifying $X(1910)$ and $X(2300)$ as $h_1$ or $h_1^\prime$ states. Our numerical results suggest that $X(1910)$ could be a promising candidate for the $h_1^\prime(2^1P_1)$ state with quark content $s\bar{s}$, while the structure of $X(2300)$ remains uncertain.